<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form action="/login" method="post">
    用户名：<input  type="text" name="userName"/><span th:text="${userNameError}"></span><br>
    密码：<input type="password" name="password"><span th:text="${passwordError}"></span><br>
    <input type="submit" value="登陆">
</form>

</body>
</html>